AzureDriver and rights assigned in Azure

Hi,

I just started my journey with the Azure Driver and I got stuck at a point. After starting the driver, during initialization, it throws this error:

[10/01/20 20:37:54.845]:AZR PT:Azure AD Driver_Azure: Generating New Bearer Token
[10/01/20 20:37:54.845]:AZR PT:Azure AD Driver_Azure: Connecting to REST service via OAuth2
[10/01/20 20:37:55.204]:AZR PT:Azure AD Driver_Azure: Did a HTTP GET again with 0 bytes of data to https://graph.windows.net/b18d1699-4896-484b-b111-1d2da3570a73/directoryObjects?api-version=1.6&$filter=isof('Microsoft.DirectoryServices.User') or isof('Microsoft.DirectoryServices.Group')&deltaLink=
[10/01/20 20:37:55.287]:AZR PT:Azure AD Driver_Azure: Response code and message: 401 Unauthorized
[10/01/20 20:37:55.288]:AZR PT:Azure AD Driver_Azure: Calling document modifier class com.novell.nds.dirxml.driver.azure.apiext.GraphAPIExtension.modifySubscriberResponse()
[10/01/20 20:37:55.288]:AZR PT:Azure AD Driver: Received response document from subscriber
[10/01/20 20:37:55.289]:AZR PT:
<nds dtdversion="3.0">
<source>
<product build="20200605_0706" version="1.1.0.0">Identity Manager REST Driver</product>
<contact>NetIQ Corporation.</contact>
</source>
<output>
<status level="error" type="driver-general">
<driver-operation-data class-name="users" command="delta-token-only" dest-dn="">
<response method="GET" url="https://graph.windows.net/b18d1699-4896-484b-b111-1d2da3570a73/directoryObjects?api-version=1.6&amp;$filter=isof('Microsoft.DirectoryServices.User') or isof('Microsoft.DirectoryServices.Group')&amp;deltaLink=">
<url-token/>
<header ocp-aad-dq-include-only-delta-token="true"/>
<value message="Unauthorized" status="401">{"odata.error":{"code":"Authorization_RequestDenied","message":{"lang":"en","value":"Insufficient privileges to complete the operation."}}}</value>
</response>
</driver-operation-data>
</status>
</output>
</nds>

The privileges assigned to my application that I have set into Azure, for IDM, are done according to the documentation here:

https://www.netiq.com/documentation/identity-manager-48-drivers/msazure_ad/data/preparing-for-installation.html

Any idea if something else should be added? Or something to check?

Thanks,
Adrian